package org.huangrui.juc.source.tl;

import java.util.HashMap;

/**
 * @Author hr
 * @Create 2024-04-20 23:17
 */
public class T04_T1 {
    public static void main(String[] args) {
        ThreadLocal<String> tl = new ThreadLocal<>();    //line1
        tl.set("zzyybs@126.com");                        //line2
        tl.get();                                        //line3

        new HashMap<>().put(null,123);
    }
}
